part of cytoplasmic side of endosome membrane late endosome membrane cytoplasmic side of late endosome membrane https://github.com/geneontology/go-ontology/issues/31515 GO:0098560 cellular_component In GO, 'external side' still refers to part of the membrane and does not refer to components beyond (outside of) the membrane. The leaflet of the late endosome membrane that faces the cytoplasm, including any protein embedded in, attached to, or peripherally associated with it. external side of late endosome membrane external leaflet of late endosome membrane